expose arrayFunctionTaintStep in TaintTracking.qll

javascript/ql/src/semmle/javascript/dataflow/TaintTracking.qll

@@ -263,6 +263,8 @@ module TaintTracking {
     }
   }
 
+  predicate arrayFunctionTaintStep = ArrayTaintTracking::arrayFunctionTaintStep/3;
+
   /**
    * A taint propagating data flow edge for assignments of the form `o[k] = v`, where
    * `k` is not a constant and `o` refers to some object literal; in this case, we consider

javascript/ql/src/semmle/javascript/security/dataflow/IndirectCommandArgument.qll

@@ -52,7 +52,7 @@ private DataFlow::SourceNode argumentList(SystemCommandExecution sys, DataFlow::
     result = pred.backtrack(t2, t)
     or
     t = t2.continue() and
-    ArrayTaintTracking::arrayFunctionTaintStep(result, pred, _)
+    TaintTracking::arrayFunctionTaintStep(result, pred, _)
   )
 }